John Hearn

• John Hearn (politician), Irish-born Canadian merchant and politician
• John Gabriel Hearn, Canadian businessman and political figure
• John Graham Hearn, British speed skater
• J. T. Hearne, British cricket bowler
• J. W. Hearne, British cricket all-rounder
• John Hearne (lawyer), Irish legal scholar and diplomat
• John Hearne (writer), Canadian-born Jamaican writer and educator
• John Hearne (composer), Scottish composer, conductor and singer
• Jack Hearn, born John Hearn, British judo instructor